29
S
y
s
tem Mode =
OFF?
Inp
u
t
s
-> FIRE ->
F
S
D in
a
l
a
rm?
HVAC Mode = OFF
(Fire
S
h
u
tdown)
HVAC Mode = OFF
(Di
sab
led)
Unit not in f
a
ctory
te
s
t
AND
fire-
s
moke
control mode i
s
a
l
a
rming?
Inp
u
t
s
-> FIRE ->
PRE
S
in
a
l
a
rm?
HVAC Mode = OFF
(Pre
ssu
riz
a
tion)
Inp
u
t
s
-> FIRE ->
EVAC in
a
l
a
rm?
HVAC Mode = OFF
(Ev
a
c
ua
tion)
HVAC Mode = OFF
(P
u
rge)
Config->UNIT->
C.TYP ch
a
nged
while
u
nit r
u
nning?
15-
s
econd del
a
y
HVAC Mode = OFF
(Di
sab
led)
S
y
s
tem Mode =
TE
S
T?
HVAC Mode = TE
S
T
S
ervice Te
s
t ->
S
.
S
TP = YE
S
?
HVAC Mode =
S
oft
S
top
Re
qu
e
s
t
Config->UNIT->
RM.CF =2
AND
Inp
u
t
s
->GEN.I->
REMT = ON
HVAC Mode = OFF
(Rem.
S
w. Di
sab
le)
Config->
S
P->
S
P.CF
= 1
OR
2
HVAC Mode = OFF
(
S
t
a
tic Pre
s
. F
a
il)
Config->UNIT->
S
F
S
.M=1
OR
2
AND
Config->UNIT->
S
F
S
.
S
=YE
S
?
HVAC Mode = OFF
(F
a
n
S
t
a
t
us
F
a
il)
HVAC Mode = OFF
(
S
t
a
rting Up)
Unit
s
h
u
tting down?
HVAC Mode =
S
h
u
tting
Down
Unit control free to
s
elect
norm
a
l he
a
ting/cooling
HVAC mode
HVAC Mode = OFF
HVAC Mode =
Tempering Vent
HVAC Mode =
Tempering LoCool
HVAC Mode =
Tempering HiCool
HVAC Mode = Vent
HVAC Mode = Low Cool
HVAC Mode = High Cool
HVAC Mode = Low He
a
t
HVAC Mode = High He
a
t
HVAC Mode = Unocc.
Free Cool
No
No
No
No
No
No
No
No
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
S
y
s
tem
Mode
Fire-
S
moke
Control
Exception
s
Unit
control free
to choo
s
e
HVAC
Mode
a
nd
s
t
a
tic pre
ssu
re
s
en
s
or h
as
f
a
iled
a
nd
su
pply f
a
n
h
as
f
a
iled
Ye
s
Ye
s
Ye
s
Ye
s
No
No No
No
Unit j
us
t w
a
king
u
p
from power re
s
et?
HVAC Mode =
Re-He
a
t
Compre
ss
or cont
a
ctor
welded on?
HVAC Mode = Comp.
S
t
u
ck On
Ye
s
No
HVAC Mode =
Deh
u
midific
a
tion
Fig. 4 — Mode Selection
a48-8656
Summary of Contents for Carrier Weathermaker 48A2
Page 105: ...105 Fig 20 Typical Main Control Box Wiring Schematic 48 50A2 A3 A4 A5 Units...
Page 106: ...106 Fig 21 Typical Auxiliary Control Box Wiring Schematic...
Page 107: ...107 Fig 22 Typical 2 Stage Gas Heat Wiring Schematic Size 060 Units Shown a48 8357...
Page 108: ...108 TO NEXT PAGE Fig 23 Typical Staged Gas Heat Wiring Schematic Size 060 Units Shown A48 7296...
Page 109: ...109 Fig 23 Typical Staged Gas Heat Wiring Schematic Size 060 Units Shown cont A48 8358...
Page 110: ...110 Fig 24 Typical Electric Heat Control Schematic 50 Series Size 060 Units Shown a50 8228...
Page 111: ...111 Fig 25 Typical Power Schematic 48 50A2 A3 A4 A5 060 Unit Shown...
Page 112: ...112 Fig 26 Typical Low Ambient Controls Option Wiring...
Page 113: ...113 Fig 27 Typical Small Chassis Component Location Size 020 035 Units...
Page 114: ...114 Fig 28 Typical Large Chassis Component Locations Size 040 060 Units...
Page 118: ...118 Fig 30 Economizer Control Board ECB1 and VAV Control Board ECB2 A48 7706...
Page 142: ...142 A48 3733 Fig 56 Main Burner Removal...
Page 176: ...176 APPENDIX C VFD INFORMATION cont Fig F Internal Enclosure Fan Replacement A48 7716...
